当我们讨论多电子原子的轨道时，它们的能量实际上比对应的氢原子轨道要低。

When we talk about orbitals in multi-electron atoms, they're actually lower in energy than the corresponding H atom orbitals.

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12月的警告信中写道：“只有当我们讨论生物物理极限的后果时，我们才有希望降低其速度、严重性和危害。”

"Only if we discuss the consequences of our biophysical limits," the December warning letter says, "can we have the hope to reduce their speed, severity and harm."

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当我们讨论语言时，我们到底在讲些什么？

What are we talking about when we talk about language?

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Now, when we talked about optimization problems in dynamic programming, I said there were two things to look for.

现在，当我们讨论,动态编程中的最优化问题时，我想说有两件事需要注意。

麻省理工公开课 - 计算机科学及编程导论课程节选

And specifically, when we talk about ionization energy, it's assumed that what we mean is actually the first ionization energy.

特别地，当我们讨论电离能的时候，我们默认,这指的是第一电离能。

麻省理工公开课 - 化学原理课程节选

And, we'll talk about fuel cells later in the semester when we do the unit on redox reactions and electrochemistry.

这学期我们随后会讨论燃料电池,当我们讲到,关于氧化还原反应和电化学单元时。

麻省理工公开课 - 固态化学导论课程节选